Finding the Fourth Proportional to 37,978.96, 52,412.04 and 21,211.60

Step by Step Solution

1. Step 1: Write the proportion equation
   37,978.96 : 52,412.04 = 21,211.60 : x
2. Step 2: Convert to fraction form
   37,978.96/52,412.04 = 21,211.60/x
3. Step 3: Cross multiply
   37,978.96x = 52,412.04 × 21,211.60
4. Step 4: Simplify right side
   37,978.96x = 1,111,743,227.66
5. Step 5: Solve for x
   x = 1,111,743,227.66/37,978.96
6. Step 6: Final answer
   x = 29,272.61